Preparation method of titanium-based composite coating enhanced with nanometer titanium carbide and used on titanium alloy surface

A technology of nano-titanium carbide and composite coating, applied in metal material coating process, coating, molten spraying, etc., can solve the problems of low hardness, poor wear resistance, and hindering application of titanium alloys, and achieve high hardness and durability Abrasion resistance, effect of improving wear resistance

Active Publication Date: 2019-10-25
UNIV OF SCI & TECH BEIJING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, titanium alloys have the disadvantages of low hardness and poor wear

Method used

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  • Preparation method of titanium-based composite coating enhanced with nanometer titanium carbide and used on titanium alloy surface
  • Preparation method of titanium-based composite coating enhanced with nanometer titanium carbide and used on titanium alloy surface
  • Preparation method of titanium-based composite coating enhanced with nanometer titanium carbide and used on titanium alloy surface

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0027] Example 1

[0028] In this example, the composite coating of the present invention was sprayed on the TC4 titanium alloy substrate, and the raw materials were titanium powder and sucrose. Specific steps are as follows:

[0029] 1) Mix titanium powder (85wt%) and sucrose (15wt%) in proportions. The particle size of titanium powder is 1-20μm and the particle size of graphite is 2-5μm. Wet milling in a planetary ball mill. The milling medium is anhydrous ethanol. The ball to material ratio is 10:1, and the ball milling time is 1 hour;

[0030] 2) Add deionized water to the ball milled slurry to adjust its solid content to 50%, add dispersant (add 5ml slurry A15 solution per kilogram of slurry), binder (add 40g 10% PVA solution per kilogram of raw material powder) ), defoamer (add 0.5g n-butanol per kilogram of slurry), and use a mechanical stirrer to stir for 1 hour to obtain a uniform suspension slurry;

[0031] 3) Transport the suspended slurry through a peristaltic pump into ...

Example Embodiment

[0037] Example 2

[0038] In this example, the composite coating of the present invention was sprayed on the TA7 titanium alloy substrate, and the raw materials were titanium powder, graphite and sucrose. Specific steps are as follows:

[0039] 1) Mix titanium powder (70wt%), graphite (10%) and sucrose (20%) in proportions. The particle size of the titanium powder is 1-20μm and the particle size of graphite is 2-5μm. Wet grinding in a planetary ball mill, ball milling The medium is absolute ethanol, the ball-to-battery ratio is 10:1, and the ball milling time is 1 hour;

[0040] 2) Add deionized water to the ball milled slurry to adjust its solid content to 60%, add dispersant (add 5ml slurry A15 solution per kilogram of slurry), binder (add 50g 10% PVA solution per kilogram of raw material powder) ), defoamer (add 1g n-butanol per kilogram of slurry), and use a mechanical stirrer to stir for 2 hours to obtain a uniform suspension slurry;

[0041] 3) The suspended slurry is transpor...

Example Embodiment

[0047] Example 3

[0048] In this example, the composite coating of the present invention was sprayed on a TB5 titanium alloy substrate, and the raw materials were titanium powder, graphite and sucrose. Specific steps are as follows:

[0049] 1) Mix titanium powder (65%), graphite (20%) and sucrose (15%) in proportions. The particle size of titanium powder is 1-20μm, and the particle size of graphite is 2-5μm. Wet mill in planetary ball mill, ball mill The medium is absolute ethanol, the ball-to-battery ratio is 10:1, and the ball milling time is 1 hour;

[0050] 2) Add deionized water to the slurry after ball milling to adjust its solid content to 60%, add dispersant (add 5ml slurry A15 solution per kilogram of slurry), binder (add 50g 10% PVA solution per kilogram of raw material powder) ), defoamer (add 1g n-butanol per kilogram of slurry), and use a mechanical stirrer to stir for 2h to obtain a uniform suspension slurry;

[0051] 3) Transport the suspension through a peristaltic...

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Abstract

The invention provides a preparation method of a titanium-based composite coating enhanced with nanometer titanium carbide and used on the titanium alloy surface and belongs to the technical field ofmetal ceramic coating preparation. The method can be used for improving the wear-resisting property of the titanium alloy surface. According to the method, titanium powder, graphite and sugar are usedas raw materials, and titanium-carbon composite powder is prepared through the atomizing pelleting/precursor carbonizing composite technology, and the plasma spraying technology is adopted for depositing the titanium-based composite coating enhanced with nanometer titanium carbide on the titanium alloy surface. According to the method, the technology of utilizing reaction spraying to prepare nanometer titanium carbide enhanced phases is provided, the prepared composite coating is internally provided with the nanometer scale titanium carbide enhanced phases, and thus the composite coating hashigh hardness and wear-resisting property, and can be used in various titanium alloy surfaces to improve the wear-resisting property.

Description

technical field [0001] The invention belongs to the technical field of cermet coating preparation, and in particular relates to a preparation method of a nano-titanium carbide-reinforced titanium-based composite coating used on the surface of a titanium alloy. Background technique [0002] Titanium alloy has low density, high specific strength, good corrosion resistance and heat resistance, and excellent biocompatibility, and is widely used in aerospace, petrochemical, medical equipment, sports equipment and other fields. However, titanium alloys have the disadvantages of low hardness and poor wear resistance, which hinder their application in friction and wear environments. Therefore, the wear-resistant coating on the surface of titanium alloy has important application value and industrial prospect. [0003] Cermet coating is a kind of composite coating in which the ceramic reinforcement phase is dispersed in the matrix metal phase. It has both the high hardness and wear r...

Claims

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Application Information

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IPC IPC(8): C23C4/134C23C4/06
CPCC23C4/06C23C4/134
Inventor 黄继华孙轩杨健陈树海
Owner UNIV OF SCI & TECH BEIJING
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